A nasal spray sold at CVS is being recalled after concerns the product could be contaminated, according to the Food and Drug Administration.

The contaminant, identified as Pseudomonas aeruginosa, could be life-threatening for some patients, who suffer from cystic fibrosis or are immuno-compromised. Over 16,000 units of the 0.5 fluid ounce bottle are included in the recall. Product Quest, the company behind the spray, is in the process of notifying customers. So far, there have been no reports of any illnesses related to the recall.

The affected product was sold nationwide with a UPC code 50428432365. The box contains the lot number 173089J with an expiration date of September 2019. The spray can be identified by the white spray bottle and an orange label with “Sinus Relief” written in white and the CVS Health logo on the top left.